Folks

FS: 1.4.13 / OpenWrt

Topology

SIP Phone           <-> WIFI AP / NAT <->   Cloud <->            Router / NAT <->             Router / NAT <-> FS

192.168.10.x                                                       Public IP               192.168.1.x                         10.0.0.128

The SIP packets traverse the NAT chain correctly.

The RTP packets from / to Phone are from / to 192.168.10.x, so, not getting through (because private N/W addresses embedded in SIP messaging)

I am considering the following methods of handling this, but, before doing a lot of work / research, is there a better method?

1 - Using firewall rules (somehow, if possible, connection tracking?) to SNAT/DNAT packets to/from private network ranges which are not local lan range

2 – (appears simplest) Using channel variables (addresses) from SIP messaging to alter addresses prior to bridge.

Any thoughts?

Thanks;

Bill Ross